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Parallel System Overview

UIB Unit input breaker
SSIB Static switch input breaker
IMB Internal maintenance breaker
UOB Unit output breaker
SIB System isolation breaker
BB Battery breaker
MBB External maintenance bypass breaker

Simplified 1+1 Parallel System

Galaxy VS can support 2 UPSs in a simplified 1+1 parallel system for redundancy with shared unit input breaker UIB and static switch input breaker SSIB.

Simplified 1+1 Parallel System – Single Mains

Simplified 1+1 Parallel System – Dual Mains

Parallel System with Individual Unit Input Breaker UIB and Static Switch Input Breaker SSIB

Galaxy VS can support up to 3 UPSs in parallel for capacity and up to 3+1 UPSs in parallel for redundancy with individual unit input breaker UIB and static switch input breaker SSIB.

NOTE: The internal maintenance breaker IMB can only be used in a simplified 1+1 parallel system. In any other parallel system, an external maintenance bypass breaker MBB must be provided and the internal maintenance breaker IMB* must be padlocked in the open position.

Parallel System – Single Mains

Parallel System – Dual Mains

Parallel System with Shared Unit Input Breaker UIB and Static Switch Input Breaker SSIB

Galaxy VS can support up to 3 UPSs in parallel for capacity and up to 3+1 UPSs in parallel for redundancy with shared unit input breaker UIB and static switch input breaker SSIB.

NOTE: The internal maintenance breaker IMB can only be used in a simplified 1+1 parallel system. In any other parallel system, an external maintenance bypass breaker MBB must be provided and the internal maintenance breaker IMB* must be padlocked in the open position.

Parallel System – Single Mains

Parallel System – Dual Mains

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